Director's Report for 1981
Jennifer M. Shay

Resident Biologist's Report for 1981
Robert M. R. Barclay

Foraging strategies of insectivorous bats at Delta Marsh
Robert M.R. Barclay, University Field Station (Delta Marsh)

Advertising behaviour in marsh and grassland Icterids
Susan Cosens, Department of Zoology, University of Toronto

Periphytic algal community structure in response to simazine additions
L. Gordon Goldsborough, Department of Botany, University of Manitoba

Factors influencing the selection of prey by foraging House Wrens
Dan Guinan, Department of Zoology, University of Manitoba

An investigation of the influence of two herbicides upon algal photosynthesis - a progress report
Gordon G. C. Robinson, Department of Botany, University of Manitoba

Continuation of studies of the ecological relationships of birds in the forested dune ridge, Delta Marsh (Abstract)
Spencer G. Sealy, Department of Zoology, University of Manitoba

The timing of migrations in a breeding population of Least Flycatchers in Manitoba
Spencer G. Sealy and Gloria C. Biermann, Department of Zoology, University of Manitoba

A comparison of the vegetation at the north end of the Assiniboine Diversion with that of the adjacent marsh
Maria W. Zbigniewicz, Department of Botany, University of Manitoba

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